Machine for doubling and twisting yarns



(No Model.)

H. F. WEST.

MACHINE FOR DQUBLING AND TWISTING YARN. No. 371,235. Patented Oct.11,1887.

WITNESSES. INVENTUR. 2a.. a

N4 PETERS, Phnwumn nphar. wamin mn, 04 C.

UNITED STATES PATENT OFFICE,

HENRY F. \VEST, OF GLOUCESTER CITY, NEW JERSEY.

MACHINE FOR DOUBLING AND TWISTING YARNS.

SPECIFICATION forming part of Letters Patent N0. 371,235, dated October11, 1887.

Application filed May 27, 1887. Serial No. 239514. ("No model.)

To all whom, it may concern:

Be it known that I, HENRY F. WEsT, of Gloucester City, in the county ofCamden and State of New Jersey,have invented certain new and usefulImprovements in Machines for Doubling and Twisting Yarns, of whichimprovements the following is a specification.

My invention relates to certain improvements in machines for twistingyarns of the type shown and described in the Letters Patent'No. 343,208,dated June 8, 1886.-

The main object of my invention is to improve the twisting and doublingof yarn or other similar material-that is to say, to more thoroughly andeconomically twist the fibers of the yarn into the body thereof-to makea more uniform and smoother twist and a much better thread by laying thestrands of yarn or other material more evenly together, whereby thevalue oftheproductwill be muchimproved;

and a further object of my invention is to ob viate the catchingtogether of the threads or the breaking down of ends while being twistedor doubled,'and this is especially important at the point of delivery ofthe thread or yarn from the top to the bottom roller, because with thecommoner yarn or material of a similar nature containing seeds and motesthe tendency of it has been,while being twisted or doubled on a machineof the ordinary well-known type, for the threads to catch together,especially at the above-mentioned point, and to constantly break down,incurring considerable loss of material and expense as well as labor andtime in repairing the damage, whereas it is the object and purpose of myinvention to obviate these objectionable features and results and,

to reduce the waste to a minimum. The means by which I accomplish theseends will be described hereinafter, and the features of improvement insaid machine specifically pointed out in the claims.

Previous to my invention three principal ways of doubling and twistingyarns were resorted to: first, placing the spools (two or more) in acreel and carrying the several threads from the spools to a point atwhich they were ,7

brought together as they passed over thetop roll and between it and thelower rolltb the twister-spindle; second, winding a large number ofthreads upon the warper-beam and carrying two or more of these threadsover and between the rolls to the twister-spindle, (in both of theabove-enumerated cases the rolls were plane-surfaced rolls;) and, third,using the doubling-spooler-that is, doubling upon one spool as manythreads (two or more)-as were to be twisted, and then placing the spoolon the twister and twisting the strands together as in the other cases,the last mentioned being the most improved of the three ways, but,however, the most expensive in cost oflabor, and in common with theother two ways, though in a less degree, subject to difliculties whichit has been deemed eminently desirable to obviate, as is well understoodby those using such machinery, and to obviate which is the end sought tobe accomplished by my invention.

My invention consists in providing the top and bottom rolls,respectively, of a machine for twisting yarns with narrow grooves or recesses, as hereinafter more particularly explained.

In the accompanying drawingslhaveshown my invent-ion in a form foundpractically efficient, and in which Figure l is a sectional sideelevation, and Fig. 2 is a front elevation, of a portion of a machinefor twisting yarns with my invention applied thereto, and showing also,in section, the traveler-ring and its support.

Referring to the drawings for a further description of my invention, Aand AVare the spools on which the yarn is previously wound, and whichare supported in a creel, B, of the construction and in the mannerheretofore well understood, and the thread is carried from each spoolthrough a guide, a, to the top roll, 0. This top roll, 0, is providedwith a sawtooth-shaped groove or recess, I), while the lower roll, D,has preferably a V shaped groove or recess, 01. It is nevertheless to beunderstood that the respective depths of the grooves or recesses b and din the top and bottom rolls, 0 and D, must be such as to accommodateyarn or threads, (of whatever given ply,,)which are to be passed aroundthe grooves ,or recesses, to be hereinafter more particu- IOC and thencepass one-half or more times around the narrow groove or recess d in thebottom roll, D, through asecond eye, 0, in the guide board 0, to thetraveler e in the traveler-ring E, mounted on its support 0, throughwhich they pass to the bobbin I, and are twisted and wound upon thebobbin in the usual well-understood manner. The top roll, 0, rests uponthelower roll, D, and this lower roll is driven from the maindrivingshaft F by a train of wheels, H, H, and H as shown in Fig. 1,while the top or driven roll, 0, receives its rotatory motion from itsfrictional contact with the bottom or'driviug roll, D.

The principal advantages incident to the use of the sawtooth and Vshaped grooved or recessed top and bottom rolls are, first, that greateruniformity and regularity of tension are secured, and consequently thereis less breaking down of ends; but, however, in any event the waste isreduced to a minimum, while, by practical demonstration of theinvention, the saving has been in the neighborhood of ninety per cent;second, when a thread breaks down it will not become entangled with theneighboring threads, but will simply pick itself up automatically and bewound around the narrow groove in the top roll until this groove isfilled so far as to bring the yarn or thread out ina line with the planesurface on each side of this top roll, 0, ultimately causing thestoppage of this rolls rotation; third, the threads pass in a straightcourse around the grooves in the respective rolls, and hence thewasteful results attending the use of the ordinary plane surfaced rollsfor such purposes are entirely'obviated, and the making of any otherdoubling than the one designed or the intended ply prevented, and whenthe band drops off the whirl the slack yarn confined in the narrowgroove is automatically picked up and wound or lapped around the same;and, fourth, the finished product is far superior to that heretoforeproduced, because there is greater uniformity in the twist or laying-upof the strands and long fibers, due to the character of grooved rollsused in the operation, and the finished thread is hence much better,because an opportunity is given it in the twisting and doublingoperation to dispose of any motes or seeds that the yarn or othermaterial being treated may contain, and therefore, notwithstanding theseeming simplicity of this invention, it is, as a matter of fact, ofmuch practical importance and value in the particular art to which itbelongs.

Having thus described the nature and objects of the invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. The combination of a driving-roll having a narrow groove or recesswith a top roll having a groove or recess therein, substantially as andfor the purposesset forth.

2. The combination, with a bottom planesurfaced roll with a narrowgroove therein, of a top roll with a saw-toothshaped groove therein,substantially as and for the purposes set forth.

3. The combination of a driving-roll pro vided with a V-shaped grooveand a driven roll with a sawtooth-shaped groove, substantially as shownand described, for the purposes set forth.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesscs.

HENRY F. WEST.

\Vitnesses:

THOMAS M. SMITH, GEO. W. REED.

